1302442891 has 2 divisors, whose sum is σ = 1302442892. Its totient is φ = 1302442890.

The previous prime is 1302442819. The next prime is 1302442961. The reversal of 1302442891 is 1982442031.

Together with previous prime (1302442819) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1982442031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1302442891 - 2⁷ = 1302442763 is a prime.

It is not a weakly prime, because it can be changed into another prime (1302442591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651221445 + 651221446.

It is an arithmetic number, because the mean of its divisors is an integer number (651221446).

Almost surely, 2^1302442891 is an apocalyptic number.

1302442891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1302442891 is an equidigital number, since it uses as much as digits as its factorization.

1302442891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1302442891 is about 36089.3736576295. The cubic root of 1302442891 is about 1092.0760844870.

The spelling of 1302442891 in words is "one billion, three hundred two million, four hundred forty-two thousand, eight hundred ninety-one".